<!DOCTYPE html>
<html lang="zh-Hans-CN">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <link rel="stylesheet" href="./style.css">
</head>

<body>
  <main>
    <div class="animation">
      Animation
    </div>

    <div class="gradient-shadow">
      阴影渐变
    </div>
  </main>
</body>

</html>